Needle



Jan. 1 2 1926.

w. BRODY mannma Filed April 4. 1924 Wuliam Blvd].

Patented Jan. 12, 1926.

UNITED STATES 1,569,453 PATENT OFFICE.

WILLIAM BRODY, OF NET/V YORK, N. Y.

NEEDLE.

Application filed ApriL-l, 1924. Serial No. 704,233.

To all whom it may concern:

Be it known that I, VVILLIAM BRODY, a citizen of the United States ofAmerica, residing at New York, in the county of New York and State ofNew York, have invented certain new and useful Improvements in Needles,of which the following is a specification.

My invention relates to improvements 111 needles of the type employedfor conduction anesthesia, and more particularly to means for securingthe needle into its holder with a liquid tight joint.

Heretofore, it has been customary to form the head of this type ofneedle of soft metal, and when the nozzle was tightened the metal wouldflow or spread under the pressure and often extend the threads of thenozzle so as to make it impossible to remove the nozzle. This removal isnecessary for sterilization of the needle, and if the needle cannot beseparated, the entire piece, both needle and nozzle, must be thrownaway.

An important object of this invention is to overcome these objectionsand still secure a liquid tight joint between the needle and thesyringe.

Another object of the invention is the provision of a device of theabove mentioned character which will be simple in operation andconstruction, strong and durable.

In the accompanying drawing forming a part of this specification and inwhich like numerals are employed to designate like parts throughout thesame:

Figure 1 is a view of a completely assembled needle ready for operation,parts being shown in section,

Figure 2 is a side elevation of the needle, parts being shown insection,

Figure 3 is a top plan view of the same, and,

Figure l is a detail perspective view of the head element.

In the drawings, wherein for the purpose of illustration is shown apreferred embodiment of my invention, the numeral 5 designates the usualsyringe which carries the threaded nipple 6 which is provided with thecentrally arranged longitudinal passage 7. The nozzle 8 is adapted to bescrewed onto the nipple 6 and is provided with a central longitudinalopening 9 for the reception of the .10, This nozzle i p ovided with asocket 11 which is screwthreaded to receive the nipple.

Spaced from the butt of the needle is a head 12 which is formed of hardmetal. This head is solid but for the opening 13 which receives theneedle, and is adapted to be pressed on to the needle so as to form anintegral part thereof, so spaced from the butt of the needle as to leavea portion i l of the needle projecting a considerable distancetherebeyond. This head has a groove impressed into its top so as to forma sunken portion or depression 15, and a rim or ridge '16 about the edgeof the head, which is preferably of cylindrical formation.

In assembling, the needle is slipped into the nozzle 8 as usual, and therear or lower portion of the head will contact with the end wall of thesocket 11 of the nozzle when the nozzle is screwed onto the nipple 6,and the end portion 14- of the needle will enter the passage 7 and serveto steady and straighten the needle. The rim or ridge 16 will contactwith the front face of the nipple and completely surround the opening 7.The nozzle can be tightened to any extent desirable but the head willnever give, and a liquid tight joint will be formed due to the fact thatonly a small portion of the surface of the head touches the nipple.

It will therefore be seen that I have provided a joint which absolutelyleak proof. and which will allow of any amount of pressure being appliedwithout any spreading on the part of the head, and there will be nodifiiculty in removing the nozzle after operation. This allows forconvenient sterilization and therefore renders the needle more hygienic.

It is to be understood that the form of my invention herewith shown anddescribed is to be taken as a preferred example of the same, and thatvarious changes in the shape, size, and arrangement of parts may beresorted to without departing from the spirit of my invention or thescope of the subjoined claims.

Having described my invention what I claim and desire to protect byLetters Patent is:

1. In a device of the character described, a needle adapted to beclamped against a syringe, and a head carried by said needle and spacedfrom its end, said ,"head having a portion of its top depressed to forma ridge adapted to form a small area of contact with the syringe.

2. In a device of the character described, a needle adapted to beclamped against a syringe, and a solid head formed of hard metal pressedonto said needle at a substantial distance from its end, said headhavinga groove pressed into its top whereby only a small portion of the topsurface of said head contacts with the syringe.

3. In a device of the character described, the combination with asyringe having an opening in its face, of a needle adapted to be clampedto the syringe, and a solid head therefor, said head being spaced fromthe end of the needle whereby, upon clamping the needle to'the sy inge,the projecting portion of the needle will enter the opening in thesyringe and fit snugly therein, and serve to straighten and steady saidneedle, said head having a large portion of its top surface pressed soas to form a dcpression, whereby only a small portion of the top surfaceof the head contacts with the syringe, thereby assuring a leak proofjoint.

4:. In a device of the character described, the combination with asyringe having an opening, a nozzle adapted to be screwed onto thesyringe, a needle received in an opening in said nozzle, and a solidhead formed of hard metal, pressed onto said needle at a point spacedfrom its end, said head having the inner portion of its top surfacedepressed so that only a small. portion of the top surface of said headwill contact with said syringe, and completely surround the openingtherein, and whereby the nozzle may be tightened to press the headagainst the syringe without danger of the head giving or spreading.

' 5. In a device of the character described, a needle adapted to beclamped against a syringe, and a solid head of hard metal carried bysaid needle having a groove in its top surface whereby an annular ridgeof very small area contacting with the end surface of the syringe nippleis formed.

6. In a device of the character described, the combination with asyringe having an opening, of a nozzle adapted to be screwed onto thesyringe, a needle received in an opening in said nozzle, and a solidhead of cylindrical formation formed of hard metal pressed onto saidneedle at a point spaced from its end, said head having the innerportion of its top surface depressed so that only a small portion of thetop surface of said head will contact with said syringe and completelysurround the opening therein, and whereby when the nozzle is tightened,a portion thereof will bear against the flat under surface of the headand force the top surface of the head into intimate contact with thesyringe, without danger of the head giving or spreading.

7. In a device of the character described, the combination witha syringehaving a screw threaded nipple provided with a central bore and a flat,unbroken end surface, of a nozzle adapted to be screwed onto the nipple,said nozzle having a recess provided with a fiat end surface andinteriorly screw threaded to engage the screw threaded nipple, a needlereceived in an opening in said nozzle, and a solid head of cylindricalformation formed of hard metal, pressed onto said needle at a pointspaced from its end, said head having the inner portion of its topsurface depressed so that only a small portion of the top surface ofsaid head will contact with said syringe and completely surround theopening therein, and whereby when the nozzle is tightened, the flat endsurface of the recess therein will bear against the flat under surfaceof the head and force the top surface of the head into intimate contactwith the flat end surface of the nozzle, without danger of the headgiving or spreading.

In testimony whereof I atlix my signature.

IVILLIAM BRODY.

